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Billings WWT is a secondary treatment plant in Noble County, Oklahoma, serving a small population of 436. It discharges 189.27 megaliters annually and operates under U.S. Clean Water Act regulations.
Red Rock WWT is a secondary treatment plant in Noble County, Oklahoma, serving a small population of 293. It discharges 75.71 units of treated wastewater daily, with a designed capacity of 113.56 units.